Casey O'Connell, MD, FACP
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| Title(s) | Professor of Medicine (Clinical Scholar) |
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| School | Keck School of Medicine of Usc |
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| Address | 1441 Eastlake Ave. Health Sciences Campus Los Angeles CA 90033
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| Phone | +1 323 865 3950 |
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| vCard | Download vCard |
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| Title(s) | Lawrence and Janice Kelly Chair in Hematology |
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| Title(s) | Director, Gehr Cures: Myeloid Malignancy Program of USC |
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Biography
| Southern California Top Doctors | 2026 | | Hall of Fame Super Doctors Legacy Member |
| Cayenne Wellness Center and Children's Foundation | 2024 | | Cayenne Wellness Center Sickle Cell Award |
| The Los Angeles Business Journal | 2024 | | Leader of influence |
| LAC+USC Medical Center | 2022 | | Outstanding Faculty Teaching Award |
| The Myelodysplastic Syndromes Foundation, Inc. | 2022 | | MDS Foundation Nobility in Science Award |
| American College of Physicians | 2017 | | Fellowship in the American College of Physicians (ACP) |
| Keck School of Medicine | 2016
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| 2017 | Outstanding Year II Teaching Award |
| Keck School of Medicine | 2013 | | Master Teacher Distinction |
| LAC+USC Medical Center | 2013 | | Medical Staff Leadership Recognition Award |
| Keck School of Medicine | 2012
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| 2013 | Outstanding Year I Teaching Award |
| Keck School of Medicine | 2011
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| 2012 | Best Year I System |
| Southern California Top Doctors | 2010
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| 2024 | Top Doctors |
| Los Angeles Magazine Top Doctors | 2010
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| 2024 | Top Doctors Award |
| Keck School of Medicine | 2008
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| 2009 | Outstanding Year I Teaching Award |
| Division of Hematology, USC | 2006
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| 2007 | Fellow Research Award |
| Division of Hematology, USC | 2004
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| 2005 | Fellow Teaching Award |
| USC Department of Medicine | 2003
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| 2004 | Senior Resident of the Year |
| USC Department of Medicine | 2003
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| 2004 | Brautbar Teaching Award |
| Keck School of Medicine | 2003 | | Outstanding Resident Teaching Award |
| George Washington University Department of Medicine | 2001 | | Jorge C. Rios Award in Internal Medicine |
| 1999 | | Laszlo M Tauber Scholarship |
| George Washington University School of Medicine | 1998 | | William Beaumont Medical Research Honor Society |
Overview
Dr. Casey O’Connell is a Professor of Medicine (Clinical Scholar) in the Jane Anne Nohl Division of Hematology at the Keck School of Medicine, University of Southern California (USC). She did her undergraduate work at Stanford University and completed her medical degree with distinction at the George Washington School of Medicine. She began her career as a clinical researcher at USC’s Norris Comprehensive Cancer Center in the area of cancer-related thrombosis by describing the clinical significance of incidental pulmonary embolism identified on routine cancer staging CT scans. Her original work in this area was published in the Journal of Clinical Oncology and brought this clinical entity to the attention of oncologists worldwide. Dr. O’Connell’s background in cancer-related thrombosis has generated a focused interest in Myeloproliferative Neoplasms (MPNs), which include Polycythemia Vera, Essential Thrombocytosis and Myelofibrosis. In addition to leading clinical treatment trials for patients with these malignancies, she pursues translational research seeking to discover how they induce arterial and venous thrombosis. The MPNs and Myelodysplastic syndrome (MDS) are malignant hematopoietic disorders with pleiotropic clinical manifestations. Dr. O’Connell is interested in optimizing the role of epigenetic therapy in these pre-leukemic conditions that can lead to acute myeloid leukemia.
As director of the new GEHR CURES Myeloid Malignancy Program, Dr. O’Connell is focused on optimizing therapies and on novel ways to intervene earlier to prevent progression of these disorders. Dr. O’Connell is proudest of her accolades for patient care in Southern California and for teaching at the Keck School of Medicine.
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A plain language summary of the ASCERTAIN trial: oral decitabine and cedazuridine versus intravenous decitabine for MDS or CMML
. 2025; 8(21):929-941.
Guillermo Garcia-Manero 1, James McCloskey 2, Elizabeth A Griffiths 3, Karen W L Yee 4, Amer M Zeidan 5, Aref Al-Kali 6, H Joachim Deeg 7, Mitchell Sabloff 8, Mary-Margaret Keating 9, Nancy Zhu 10, Nashat Y Gabrail 11, Salman Fazal 12, Joseph Maly 13, Olatoyosi Odenike 14, Amy E DeZern 15, Casey L O'Connell 16, Gail J Roboz 17, Lambert Busque 18, Rena Buckstein 19, Harshad Amin 20, Brian Leber 21, Aditi Shastri 22, Aram Oganesian 23, Harold N Keer 23, Mohammad Azab 24, Michael R Savona 25. View Publication.
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A multicenter study to assess efficacy, safety, and tolerability of ropeginterferon alfa-2b-njft in patients with essential thrombocythemia in the US and Canada: EXCEED-ET trial. 2025; 12(17).
Masarova L, Reeves BN, El Chaer F, Foltz L, Tashi T, Abu-Zeinah G, Lucas J, Halpern AB, Maze D, Qin A, Safah H, Lan F, O'Connell CL, Goel S, Rein L, Fang B, How J, Babu S, Li Z, Cerquozzi S, Oh ST, Hunter AM, Podoltsev N, Vachhani P, Yacoub A, Cunningham JM, Hillis C, Otoukesh S, Zagrijtschuk O, Castro H, Bose. View Publication.
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Novel Approaches to the use of hypomethylating agents in myeloid malignancies. 2025; 16(17):1201-1212.
Cheng J, O'Connell C. View Publication.
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Idiopathic erythrocytosis: A diagnostic and management challenge with emerging areas for exploration. Br J Haematol. 2024 03; 204(3):774-783.
O'Neill C, O'Connell C. PMID: 38262687.
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PubMed Mentions:
1 Fields:
Translation:
Humans
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Oral decitabine-cedazuridine versus intravenous decitabine for myelodysplastic syndromes and chronic myelomonocytic leukaemia (ASCERTAIN): a registrational, randomised, crossover, pharmacokinetics, phase 3 study. Lancet Haematol. 2024 Jan; 11(1):e15-e26.
Garcia-Manero G, McCloskey J, Griffiths EA, Yee KWL, Zeidan AM, Al-Kali A, Deeg HJ, Patel PA, Sabloff M, Keating MM, Zhu N, Gabrail NY, Fazal S, Maly J, Odenike O, Kantarjian H, DeZern AE, O'Connell CL, Roboz GJ, Busque L, Buckstein R, Amin H, Randhawa J, Leber B, Shastri A, Dao KH, Oganesian A, Hao Y, Keer HN, Azab M, Savona MR. PMID: 38135371.
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PubMed Mentions:
23 Fields:
Translation:
HumansCTClinical Trials
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Guadecitabine vs TC in relapsed/refractory AML after intensive chemotherapy: a randomized phase 3 ASTRAL-2 trial. 2024; 8(23):2020-2029.
Gail J Roboz 1, Guillermo Sanz 2, Elizabeth A Griffiths 3, Karen Yee 4, Hagop Kantarjian 5, Christian Récher 6, Michael T Byrne 7, Elzbieta Patkowska 8, Hee-Je Kim 9, Xavier Thomas 10, Ine Moors 11, Wendy Stock 12, Árpád Illés 13, Pierre Fenaux 14, Yasushi Miyazaki 15, Takahiro Yamauchi 16, Casey L O'Connell 17, Yong Hao 18, Harold N Keer 18, Mohammad Azab 18, Hartmut Döhner 19. View Publication.
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Phase 2 study of add-on parsaclisib for patients with myelofibrosis and suboptimal response to ruxolitinib: final results. 2024; 6(8):1515-1528.
Abdulraheem Yacoub 1, Uma Borate 2, Raajit K Rampal 3, Haris Ali 4, Eunice S Wang 5, Aaron T Gerds 6, Gabriela Hobbs 7, Marina Kremyanskaya 8, Elliott Winton 9, Casey O'Connell 10, Swati Goel 11, Stephen T Oh 12, Gary Schiller 13, James McCloskey 14, Jeanne Palmer 15, Houston Holmes 16, Steven Hager 17, Albert Assad 18, Susan Erickson-Viitanen 19, Feng Zhou 20, Naval Daver 21. View Publication.
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A Dynamic, D-dimer-based Thromboprophylaxis Strategy in Patients with COVID-19. 2024; 13(11):887.
Lantarima Bhoopat 1 2, Anastasia Martynova 1, April Choi 3, Pattharawin Pattharanitima 2, Semi Han 1, Senxi Du 1, Ibrahim Syed 1, Catherine Chan 4, Esther E Oh 4, Zea Borok 1 5, Janice Liebler 1, Melissa Lee Wilson 6, Pichaya Tantiyavarong 2, Casey O Connell 1. View Publication.
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Clinical and pathological features of clonal cytopenia of undetermined significance presenting with isolated thrombocytopenia (CCUS-IT). Eur J Haematol. 2024 Apr; 112(4):594-600.
O'Neill C, Nwachukwu N, Vergara-Lluri M, Hagiya A, O'Connell CL. PMID: 38088145.
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Humans
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Momelotinib versus danazol in symptomatic patients with anaemia and myelofibrosis (MOMENTUM): results from an international, double-blind, randomised, controlled, phase 3 study. Lancet. 2023 01 28; 401(10373):269-280.
Verstovsek S, Gerds AT, Vannucchi AM, Al-Ali HK, Lavie D, Kuykendall AT, Grosicki S, Iurlo A, Goh YT, Lazaroiu MC, Egyed M, Fox ML, McLornan D, Perkins A, Yoon SS, Gupta V, Kiladjian JJ, Granacher N, Lee SE, Ocroteala L, Passamonti F, Harrison CN, Klencke BJ, Ro S, Donahue R, Kawashima J, Mesa R, MOMENTUM Study Investigators. PMID: 36709073.
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PubMed Mentions:
72 Fields:
Translation:
HumansCTClinical Trials
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Safety, Outcomes, and T-Cell Characteristics in Patients with Relapsed or Refractory MDS or CMML Treated with Atezolizumab in Combination with Guadecitabine. Clin Cancer Res. 2022 12 15; 28(24):5306-5316.
O'Connell CL, Baer MR, Ørskov AD, Saini SK, Duong VH, Kropf P, Hansen JW, Tsao-Wei D, Jang HS, Emadi A, Holmberg-Thyden S, Cowland J, Brinker BT, Horwood K, Burgos R, Hostetter G, Youngblood BA, Hadrup SR, Issa JP, Jones P, Baylin SB, Siddiqi I, Grønbaek K. PMID: 36222848; PMCID: PMC9772102.
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PubMed Mentions:
9 Fields:
Translation:
HumansCellsCTClinical Trials
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Anagrelide for platelet-directed cytoreduction in polycythemia vera: Insights into utility and safety outcomes from a large multi-center database. Leuk Res. 2022 08; 119:106903.
Rippel N, Tremblay D, Zubizarreta N, Podoltsev N, Gotlib J, Heaney M, Kuykendall A, O'Connell C, Shammo JM, Fleischman A, Kremyanskaya M, Hoffman R, Mesa R, Yacoub A, Mascarenhas J. PMID: 35717689; PMCID: PMC11583043.
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PubMed Mentions:
1 Fields:
Translation:
Humans
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A randomized phase 3 trial of interferon-α vs hydroxyurea in polycythemia vera and essential thrombocythemia. Blood. 2022 05 12; 139(19):2931-2941.
Mascarenhas J, Kosiorek HE, Prchal JT, Rambaldi A, Berenzon D, Yacoub A, Harrison CN, McMullin MF, Vannucchi AM, Ewing J, O'Connell CL, Kiladjian JJ, Mead AJ, Winton EF, Leibowitz DS, De Stefano V, Arcasoy MO, Kessler CM, Catchatourian R, Rondelli D, Silver RT, Bacigalupo A, Nagler A, Kremyanskaya M, Levine MF, Arango Ossa JE, McGovern E, Sandy L, Salama ME, Najfeld V, Tripodi J, Farnoud N, Penson AV, Weinberg RS, Price L, Goldberg JD, Barbui T, Marchioli R, Tognoni G, Rampal RK, Mesa RA, Dueck AC, Hoffman R. PMID: 35007321; PMCID: PMC9101248.
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PubMed Mentions:
53 Fields:
Translation:
HumansCTClinical Trials
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European LeukemiaNet Response Predicts Disease Progression but Not Thrombosis in Polycythemia Vera. Hemasphere. 2022 Jun; 6(6):e721.
Tremblay D, Srisuwananukorn A, Ronner L, Podoltsev N, Gotlib J, Heaney ML, Kuykendall A, O'Connell CL, Shammo JM, Fleischman A, Mesa R, Yacoub A, Hoffman R, Moshier E, Zubizarreta N, Mascarenhas J. PMID: 35747843; PMCID: PMC9208865.
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PubMed Mentions:
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Addition of Navitoclax to Ongoing Ruxolitinib Therapy for Patients With Myelofibrosis With Progression or Suboptimal Response: Phase II Safety and Efficacy. J Clin Oncol. 2022 05 20; 40(15):1671-1680.
Harrison CN, Garcia JS, Somervaille TCP, Foran JM, Verstovsek S, Jamieson C, Mesa R, Ritchie EK, Tantravahi SK, Vachhani P, O'Connell CL, Komrokji RS, Harb J, Hutti JE, Holes L, Masud AA, Nuthalapati S, Potluri J, Pemmaraju N. PMID: 35180010; PMCID: PMC9113204.
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PubMed Mentions:
54 Fields:
Translation:
HumansCTClinical Trials
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Tranexamic Acid in the Treatment of Refractory Gastrointestinal Arteriovenous Malformation Bleeding in Left Ventricular Assist Device Patients. Circ Heart Fail. 2022 01; 15(1):e008669.
Fong MW, Morningstar-Kywi N, O'Connell C, Qureshi U, Han EE. PMID: 34807724.
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PubMed Mentions:
1 Fields:
Translation:
Humans
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Ruxolitinib discontinuation in polycythemia vera: Patient characteristics, outcomes, and salvage strategies from a large multi-institutional database. Leuk Res. 2021 10; 109:106629.
Tremblay D, Ronner L, Podoltsev N, Gotlib J, Heaney M, Kuykendall A, O'Connell C, Shammo JM, Fleischman A, Mesa R, Yacoub A, Hoffman R, Moshier E, Zubizarreta N, Mascarenhas J. PMID: 34082375.
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PubMed Mentions:
3 Fields:
Translation:
Humans
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Treatment of Cancer-Associated Venous Thromboembolism with Low-Molecular-Weight Heparin or Direct Oral Anticoagulants: Patient Selection, Controversies, and Caveats. Oncologist. 2021 01; 26(1):e8-e16.
O'Connell C, Escalante CP, Goldhaber SZ, McBane R, Connors JM, Raskob GE. PMID: 33275319; PMCID: PMC7794180.
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PubMed Mentions:
29 Fields:
Translation:
Humans
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PubMed Mentions:
11 Fields:
Translation:
HumansCellsPHPublic Health
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ACVR1/JAK1/JAK2 inhibitor momelotinib reverses transfusion dependency and suppresses hepcidin in myelofibrosis phase 2 trial. Blood Adv. 2020 09 22; 4(18):4282-4291.
Oh ST, Talpaz M, Gerds AT, Gupta V, Verstovsek S, Mesa R, Miller CB, Rivera CE, Fleischman AG, Goel S, Heaney ML, O'Connell C, Arcasoy MO, Zhang Y, Kawashima J, Ganz T, Kowalski M, Brachmann CB. PMID: 32915978; PMCID: PMC7509854.
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PubMed Mentions:
58 Fields:
Translation:
HumansCTClinical Trials
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Oral cedazuridine/decitabine for MDS and CMML: a phase 2 pharmacokinetic/pharmacodynamic randomized crossover study. Blood. 2020 08 06; 136(6):674-683.
Garcia-Manero G, Griffiths EA, Steensma DP, Roboz GJ, Wells R, McCloskey J, Odenike O, DeZern AE, Yee K, Busque L, O'Connell C, Michaelis LC, Brandwein J, Kantarjian H, Oganesian A, Azab M, Savona MR. PMID: 32285126; PMCID: PMC7414597.
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PubMed Mentions:
78 Fields:
Translation:
HumansCellsCTClinical Trials
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Persistent leukocytosis in polycythemia vera is associated with disease evolution but not thrombosis. Blood. 2020 05 07; 135(19):1696-1703.
Ronner L, Podoltsev N, Gotlib J, Heaney ML, Kuykendall AT, O'Connell C, Shammo J, Fleischman AG, Scherber RM, Mesa R, Yacoub A, Perkins C, Meckstroth S, Behlman L, Chiaramonte M, Salehi M, Ziadkhanpour K, Nguyen H, Siwoski O, Hung AK, Janania Martinez M, Nguyen J, Patel S, Kollipara R, Dave A, Randall M, Grant M, Harrison M, Fernandez Soto P, Tremblay D, Hoffman R, Moshier E, Mascarenhas J. PMID: 32107559; PMCID: PMC7205813.
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PubMed Mentions:
41 Fields:
Translation:
Humans
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The TEMPI syndrome. Blood. 2020 04 09; 135(15):1199-1203.
Sykes DB, O'Connell C, Schroyens W. PMID: 32108223.
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PubMed Mentions:
20 Fields:
Translation:
Humans
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A Retrospective Study of the Combination of Rituximab, Cyclophosphamide and Dexamethasone for the Treatment of Relapsed/Refractory Warm Antibody Autoimmune Hemolytic Anemia. Acta Haematol. 2020; 143(3):244-249.
Piatek CI, Bocian H, Algaze S, Weitz IC, O'Connell C, Liebman HA. PMID: 31665725.
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4 Fields:
Translation:
Humans
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Unsuspected pulmonary emboli adversely impact survival in patients with cancer undergoing routine staging multi-row detector computed tomography scanning. J Thromb Haemost. 2011 Feb; 9(2):305-11.
O'Connell C, Razavi P, Ghalichi M, Boyle S, Vasan S, Mark L, Caton A, Duddalwar V, Boswell W, Grabow K, Liebman HA. PMID: 20955348.
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PubMed Mentions:
43 Fields:
Translation:
Humans
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Managing cancer-related venous thromboembolic disease: low-molecular-weight heparins and beyond. Expert Rev Hematol. 2008 Dec; 1(2):175-82.
O'Connell CL, Liebman HA. PMID: 21082922.
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Translation:
HumansAnimals
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| Year | Publications |
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| 2008 | 1 |
| 2011 | 1 |
| 2019 | 1 |
| 2020 | 6 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 3 |
This graph shows the number and percent of publications by field.
Fields are based on how the National Library of Medicine (NLM) classifies the publications' journals and might not represent the specific topics of the publications.
Note that an individual publication can be assigned to more than one field. As a result, the publication counts in this graph might add up to more than the number of publications the person has written.
To see the data as text,
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This graph shows the number and percent of publications by field.
Fields are based on how the National Library of Medicine (NLM) classifies the publications' journals and might not represent the specific topics of the publications.
Note that an individual publication can be assigned to more than one field. As a result, the publication counts in this graph might add up to more than the number of publications the person has written.
To see the data as text,
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